电池充,DC-DC转换 锂电和USB供电,便携式设备 升降压DC-DC,LCD屏背光PT1304

QUj嘉泰姆

GENERAL DESCRIPTION
QUj嘉泰姆

The PT130 4 is a current mode DC - DC controller providing excellent AC and DC line and load regulation. It is suitable for use in topologies requiring low side N MOSFET, such as boost, fly - back or SEPIC. The internal soft - start reduces the inrush current at startup. The PT130 4 provides ±2% output voltage accuracy. It consumes only 300uA quiescent current during normal operation and typically 0.1uA during shut down. The PT130 4 has built in fault condition protection features such as short - ci r cuit protection, and under voltage lock - out. The PT1304 also has an OVLO function that locks out the EXT when the input voltage is higher than 6 .9 V, although the EN, VIN, CS and EXT pins can stand up to 18V. The PT1304 incorporates programmable average c urrent limiting with ±2% accuracy, which allows accurate limiting of the average current in the inductors, independent of peak current. The operating input voltage range of the PT1304 is 3V to 5.5 V. Excellent EMI performance is achieved with Powtech’s pro prietary frequency jittering technique together with soft - drive control. The PT1304 is available in SOP8 and MSOP8 packages. F EATURES  High Output Voltage Accuracy: ±2%  ±2% Programmable Average Current Limiting  Current Mode Operation for Excellent Line a nd Load Transient Response  Frequency Jittering and Soft - Drive to Minimize EMI  Internal Soft Start  18V Capability at VIN, EN, CS and EXT pins  300uA Quiescent and 0.1uA Shutdown Current  Short - Circuit Protection  UVLO with Hysteresis  O VLO with Hysteresis  RoH S compliant A PPLICATIONS  Battery Charger s  DC - DC Converter s  Li - ion and USB Powered Systems  Portable I nstrument s  Step - up/step - down and Isolated dc/dc converter s  LCD backlighting    
QUj嘉泰姆